My old iPhone 3G, it has been jailbroken, so it cannot be upgraded from 4.x, but it still works well as a phone, email, contacts. I use it as a backup phone and it is always connected to GMail, with my contacts and calendar syncing. I have not tested any other functionality recently, but ask me to in this thread. It only needs a SIM and you are away.
Please don't buy this if you have no experience with jailbroken phones. I no longer have a need for this backup device as I have another more recent model and I loath to send it to the tip.
Includes charger as pictured. Has had a screen skin from the day I bought it. Would make a great backup phone or phone for somebody with simple expectations or maybe you know how to upgrade it despite the Jailbreak.
$30 includes shipping to anywhere in NZ.